Heterogeneous equilibria and calcite solubility. If river water in Box 7-2 is saturated

Chapter 7, Problem 7-30

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Heterogeneous equilibria and calcite solubility. If river water in Box 7-2 is saturated with calcite (CaCO3), [Ca2] is governed by the following equilibria: (a) From these reactions, find the equilibrium constant for the reaction (A) (b) The mass balance for Reaction A is [HC ] 2[Ca2]. Find [Ca2] (in mol/L and in mg/L) in equilibrium with atmospheric CO2 if . Locate this point on the line in Box 7-2. (c) The concentration of Ca2 in the Don River is 80 mg/L. What effective is in equilibrium with this much Ca2? How can the river have this much CO2? PCO

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